CSM SW upgrade

[Martin Kyrc]

Hello,

I'd like upgrade too old CSM SW release 3.1(4) to current 4.2(7). I didn't found any dependencies, or other restrictions and therefore I think it's possible to upgrade directly to this 4.2 SW release. I'm sure? (CSM in redundant configuration is located in heavy production traffic and I'd like upgrade without any surprise:)

step-by-step SW upgrade:

0. save and sync configuration

1. upgrade SW on the standby module

2. restart standby module

3. upgrade SW on the active module

4. restart active module (stateful (sure?, because different SW releases on the active and standby CSM module) switchover to standby module)

5. after reboot, switchover to this module (preempt)

6. on both modules is new SW release

Regards,

Martin

[Syed Iftekhar Ahmed]

If preempt is enabled, turn it off (on both active and standby CSM) before starting the upgrade process.

Syed Iftekhar Ahmed

[Martin Kyrc]

of course, preempt will be turned off. thanks.

my primary question was, if it's possible to do direct upgrade from 3.1(4) to 4.2(7). I think yes. I'm sure?

m.

[Syed Iftekhar Ahmed · Accepted solution]

Few months ago I did 3.1.3 --> 4.2.4 upgrade. I dont see any issues there. Just read the 4.2.7 release notes and make sure that you are running compatible IOS.

Syed

[Martin Kyrc]

thanks Syed, this is helpful information for me.

martin